Improvement in saw-sets



G. W. ATKINS. Saw Set.

No. 2o1 ,4s|@ Patented Marc'h l9, 1878.

I lzv ViENrok'.

9 v @07 ATTORNEYS.

N-FETERS, PHOTO-LITHDGRAPHER, WASHINGTON, D. C.

UNITED STATES,

PATENT. OEEIo GEORGE w. ATKINS, OF MILTON, DELAWARE.

IM PROVEMENT lN SAW-SETS.

Specification forming part of Letters Patent No. 201,481, dated March19, 1878 application filed November 9, 1877.

To all whom it may concern:

Be it known that I, GEo. W. ATKINS, of Milton, in the county of Sussexand State of Delaware, have invented certain new and use-' fulImprovements in Saw-Sets; and do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use it,reference being had to the accompanying drawings, which form part ofthis specification, in which-- Figure 1 is a perspective view of myinvention. Fig. 2 is a detail perspective view of one of the dies. Fig.3 is a longitudinal vertical section, and Fig. 4 is a plan view, of thesame.

My invention has for its object to provide a very efficient sawset,which may be constructed at slight expense.

My invention consists of a saw-set composed of two pivoted arms, havingpivoted adjustable dies, with guards and clamps, as hereinafter fullydescribed.

Referring to the accompanying drawing, A and A are two arms, havingheads a and a, respectively, through which passes a pivot, B. O is acurved rod, firmly fastened in the arm A, and passing through an openingin the arm A. D is a spiral spring, surrounding the rod 0 between thearms; and d is a retaining-pin, passed through the rod near its outerend and outside of the arm A. E and E are guards or projections on thearm A, having seats, when the arms A and A are brought together, ingrooves or recesses e'e formed in the arm-A, as shown. F F are verticalprojections on the under sides of the arms A A, forming clamps. G and Gare bits or dies, having projecting points or nibs g g and slottedopenings 9 g, through which pass screws h 71. into the arms A A. I I arelugs on the outside of the arms A A, and k k are set-screws, which passthrough said lugs and meet the edges of the dies G G.

It will be observed that the die G and lug I are slightly in advance ofor nearer to the pivotal connection B than are the die G and lug I.

The operation is as follows: The tool is passed down over the saw-blade,which is to be held teeth upward in a vise or other equivalent clampingdevice. The dies are then adjusted by means of their slots and thescrews h and it, according to the size of the saw-teeth and the extentof set required. The arms A and A are now brought toward each other,turning on their connecting-pivot, by grasping and compressing theiropposite or handle ends. This causes the nibs g g to impinge on oppositesides of alternate teeth, pressing them over and setting them. While thesetting is being effected the saw-blade or back is firmly held betweenthe clamps F F. The tool is prevented from passing down too far upon thesaw-blade by reason of the points of the saw-teeth meeting the guards EE.

The bits G G are formed by cutting or stamping from flat or bar steel,and are alike, so that but one size of cutting tool or die is requiredto make both of said setting-dies.

The arms A A are each cast in a single piece, the guards E E being, bypreference, hardened, so as to avoid injury from the points of thesaw-teeth.

The slots in the dies G G permit the latter to be moved along the arms AA to meet the requirements of different sizes of saw-teeth, and alsoallow said dies to be moved on the screws h h, as on pivots, to givemore or less set, as may be desired, to said teeth, the requiredadjustment being secured by the setscrews k. The spring D distends thearms A A after each compression.

What I claim as my invention is 1. In combination with pivoted arms A Aformed with lugs I I, holding set-screws 70 k, slotted dies G G, pivotedthereon to permit their being swung to and from each other to vary theextent of set, substantially as shown and described.

2. The tool herein described, consisting of pivoted arms A A, havingguards E E, clamps F F, and lugs I I, with pivoted adjustable dies G G,screws h is, curved rod 0, and spiral spring 1), constructed andarranged for operation substantially as shown and described.

3. The saw-setting tool, having the arms A A pivoted together, andprovided with the In testimony that I claim the foregoing I .headenlargement shown, and having recesses cut or formed in said head and attherear October, 1877.

end of the arm A, as shown, for the reception of the guards E E, thesaid guards being formed on the arm A, as and for the purpose set forth.

have hereunto set my hand this 26th day of GEORGE W. ATKINS. Witnesses:

M. D. OoNNoLLY,

CHAS. F. VAN HORN.

